Great excitement on the home turn (4,4)
I believe the answer is:
flat spin
'great excitement' is the definition.
'flat spin' can be an answer for 'excitement' (I have seen 'Confused excitement' mean 'flat spin' so perhaps 'excitement' could also mean 'flat spin'). I am unsure of the 'great' bit.
'on the home turn' is the wordplay.
'on' means one lot of letters go next to another.
'the home' becomes 'flat' (flat is a type of home or residence).
'turn' becomes 'spin' (spin is a kind of turn).
'flat' next to 'spin' is 'FLAT SPIN'.
Can you help me to learn more?
(Other definitions for flat spin that I've seen before include "agitated state" , "creates confusion" , "mad excitement" , "flap" , "state of confusion" .)